Wheel with a sound absorbing device

Patent metadata

Field	Value
Publication number	US-11900908-B2
Application number	US-202117170828-A
Country	US
Kind code	B2
Filing date	Feb 8, 2021
Priority date	Nov 11, 2020
Publication date	Feb 13, 2024
Grant date	Feb 13, 2024

Abstract

The application relates to a wheel with a sound absorption device, wherein the sound absorption device is arranged in a wheel air chamber to reduce acoustic resonance, the sound absorption device comprises two resonance sound absorption structure units which are connected in parallel, a first sound absorption frequency band of a first resonance sound absorption structure unit and a second sound absorption frequency band of a second resonance sound absorption structure unit are adjacent to each other or partially overlap with each other, and the resonance frequency of the wheel air chamber is contained at the adjacent part of the first sound absorption frequency band and the second sound absorption frequency band or in the overlapping area of the first sound absorption frequency band and the second sound absorption frequency band.

First claim

What is claimed is:

1. A wheel with a sound absorbing device, the sound absorbing device being installed in a wheel air chamber to reduce acoustic resonance, wherein the sound absorbing device comprises at least two resonance sound absorbing structure units, wherein the first sound absorbing frequency band of the first resonance sound absorbing structure unit and the second sound absorbing frequency band of the second resonance sound absorbing structure unit are adjacent to each other or partially overlap each other, and the resonance frequency of the wheel air chamber is contained in the adjacent location of the first sound absorbing frequency band and the second sound absorbing frequency band or in the overlapping area of the first sound absorbing frequency band and the second sound absorbing frequency band; the sound absorbing device is constructed as a box body composed of the first resonance sound absorbing structure unit and the second resonance sound absorbing structure unit in parallel, and the box body is fixed on the hub of the wheel, wherein the sound absorbing device integrally forms a structural resonance sound absorbing device, and serving as the structural resonance sound absorbing device, the sound absorbing device has a first-order natural mode frequency consistent with the first-order natural mode frequency of the wheel air chamber,
wherein the sound absorbing device has two side faces that define the boundaries of the two ends of the box body in the circumferential direction of the hub, wherein an open end side face is formed at one end and has an opening leading into a hollow cavity in the box body, and a closed end side face is formed at the other end, and wherein the first resonance sound absorbing structure unit and the second resonance sound absorbing structure unit of the sound absorbing device respectively form an uniporous Helmholtz resonator, wherein the interior of the box body is divided by a partition plate extending along the circumferential direction of the wheel hub into a first hollow cavity and a second hollow cavity, which are arranged side by side, pipe orifices of a first hollow pipe and a second hollow pipe are formed in the open end side face, the pipe orifices are open toward the wheel air chamber, and the first hollow pipe and the second hollow pipe respectively extend into the first hollow cavity and the second hollow cavity by distances corresponding to the pipe lengths thereof;
and wherein the resonance frequencies of the two Helmholtz resonators are not the same, the resonance frequency of the first Helmholtz resonator formed as the first resonance sound absorbing structure unit is greater than or equal to the resonance frequency of the wheel air chamber, and the resonance frequency of the second Helmholtz resonator formed as the second resonance sound absorbing structure unit is less than the resonance frequency of the wheel air chamber.

2. The wheel according to claim 1 , wherein the sound absorbing device is a rectangular hexahedral box body integrally formed from metal material or plastic material.

3. The wheel according to claim 1 , wherein the sound absorbing device is a rectangular hexahedral box body made by 3D printing process.

4. The wheel according to claim 1 , wherein the difference between the resonance frequency of the first Helmholtz resonator and the resonance frequency of the wheel air chamber is not greater than 50% of the resonance frequency of the wheel air chamber; and the difference between the resonance frequency of the second Helmholtz resonator and the resonance frequency of the wheel air chamber is not greater than 50% of the resonance frequency of the wheel air chamber.

5. The wheel according to claim 1 , wherein structural parameters of the box body of the sound absorbing device are determined by predetermined sound absorption coefficients and sound absorption volumes of the two Helmholtz resonators, and the structural parameters comprise plate thicknesses of the partition plate, the open end side face and the closed end side face; pipe orifice apertures and pipe lengths of the first hollow pipe and the second hollow pipe; and shapes, volumes and wall thicknesses of the first hollow cavity and the second hollow cavity.

6. The wheel according to claim 1 , wherein a plurality of sound absorbing devices are arranged side by side on the hub of the wheel, or a plurality of sound absorbing devices are distributed along the circumferential direction of the hub.

7. The wheel according to claim 1 , wherein the sound absorbing device abuts against the outer surface of the rim of the hub via the bottom surface of the box body in an installation state.

8. The wheel according to claim 1 , wherein the sound absorbing device is bound and fixed on the hub of the wheel by a strap, the strap presses the sound absorbing device on the outer surface of the rim of the hub from the top face of the box body of the sound absorbing device and wraps around the hub to fasten the sound absorbing device, the two end heads of the strap are fixedly connected by a buckle, and the tension of the strap can be adjusted and/or displayed with the aid of a fastening tool.

9. The wheel according to claim 8 , wherein the sound absorbing device is provided with a U-shaped groove for the embedment of the strap on the top face of the box body thereof.

Assignees

• Citic Dicastal Co Ltd

Inventors

• Li Xi
• Xu Zuo
• Zhu Zhihua
• Xu Shiwen
• Li Shide
• Huang Shaobing
• Chen Mingbo
• Li Minglei

Classifications

• G10K11/172 Primary

  using resonance effects · CPC title

• B33Y80/00

  Products made by additive manufacturing · CPC title

• B60B21/12 Primary

  Appurtenances, e.g. lining bands · CPC title

• G10K11/162

  Selection of materials · CPC title

• B60B19/00

  Wheels not otherwise provided for or having characteristics specified in one of the subgroups of this group · CPC title